Machine for setting



(Mx adeL) J. 0. STEVENS.

MACHINE P63. SETTING, SWAG INT}, SHARPBNING SAWS.

mu (1h m llllllllllllllll UNITED] STATES PATENT ric JOHN G. STEVENS, OF NATICK, MASSACHUSETTS.

MACHINE FOR SETTING, SWA GING, AND SHARPENING SAWS.

SPECIFICATION forming part of Letters Patent No. 276,641, dated May 1, 1883.

Application filed October 25, 1882. (ModeL) To all whom it may concern: 7

Beit known that I, Jornv O. STEVENS, of Natick,in the countyof Middlesex and State of Massachusetts,haveinvented certain new and useful Improvements in Saw Setting, Swagin g, and Sharpening Machines; and I do hereby declare that the followingis aclear, exact, and full description of the same, which will enable others skilledin the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in which- Figure 1 is a side view of my improved saw setting, swaging, and sharpening machine. Fig. 2 is an end view of the same. Fig. 3 is a side view of the swaging and sharpening disk,

- and Figs. 4 and 5 are sectional detail viewsof the setting-disk.

Similar letters of reference indicate corresponding parts in all the figures. My invention has relation to machines for setting, swaging, and sharpening saws; and it consists in the improved construction and combination of parts of the same, as hereinafter more fully described and claimed.

In the accompanying drawings, the letter A indicates a frame, the upper part of which forms bearings B, in which a shaft, 0, is journaled, provided at one end with a crank, D, or other means for rotating the same.

- A circular disk, E, having a laterally-projecting sleeve, F, is fastened upon the middle of shaft 0 by means of a set-screw, G, passing through the sleeve and bearing with its inner end against the surface of the shaft.

H and I are respectively the setting and the swaging and sharpening disks, both of which are of a slightly larger diameter than disk E, and are provided with central apertures, J, admitting of their being placed upon shaft 0, and screw-holes K, through which fastening-screws L may be inserted to secure them to the face of disk E. The rim of the settingdisk H is provided with recesses M, open at the sides and rim of the disk, the inner sides or bottoms, N, of which are beveled, commencing a short distance over the central plane of the disk, and inclining toward the side of the disk in such a manner that when the rim of the disk-the recesses in which must correspond in their relative distances to the relative distances of the saw-teeth-,-is brought to bear against the toothed edge of the saw, the beveled inner sides of the recesses will force the saw-teeth alternately to each side, thus setting the teeth. The rim of the swaging and sharpening disk I is somewhat wider than the teeth when set, and is serrated, so as to form a series of teeth, 0, of a size corresponding to the size ot'the teeth in the saw, and having one radial and one inclined side, forming transverse sharp edgesP, which will serve, when brought to bear against the toothed edge of a saw, to trim the vertical edge of the teeth, while the flat inclined sides of teeth 0 will press upon the backs and points of the teeth, thus swaging them.

V The saw is fed under the setting or swaging disk upon a grooved disk, Q, journaled in a block, R, having laterally-projecting eyes S, which slide upon upright bars T upon the table U oft-he frame. A screw, V, turns in a female screw-threaded hole, "W, in the table,

andbears with its upper end against the under side of block It, while spiral-springs X, wound around uprights Tand fastened to their upper ends, bear against the upper surfaces of eyes S, so that by turning screw V upward the block is raised, and with it the saw, traveling. with its back in the grooved rim of disk Q,

while by screwing it down the springs will force the block down with it. The saw is, furthermore, guided by two adjustable guides,Y, one upon each side of the saw, which are'fastened adjustably upon table U by means of screws Z,passin g through the slotted horizontally-bent lower ends of the guides.

It will thus be seen that by having setting and sharpening and swaging disks provided with different sizes of teeth various sizes of saws may be set, sharpened, and swaged by IOU ing recesses M in its rim, open at the sides and rim of the disk, and having beveled inner sides, N, and means for rotating it and supporting the saw, as and for the purpose shown and set forth.

2. In a machine for setting, swaging, and sharpening saws, the combination of the frame A, having table U and guide-bars T, shaft (J, disk E, having sleeve F and set-screw G, and adapted to have the setting or swaging disks secured upon it, grooved disk Q, block It, having laterally-projecting eyes S, screw V, springs X, and adjustable guides Y, as and for the purpose shown and set forth. 

